Sewing machine lighting device



April 1934- H. J. GOOSMAN 1,955,284

SEWING MACHINE LIGHTING DEVICE Filed Nov. 30, 1932 3 Sheets-Sheet l I 2; i 8 51, 21 3mm ,3; /h fl; 33 Herbert J Goq m n 24 l Ww'weoy r April 1934- H. J. GOOSMAN 1,955,284

SEWING MACHINE L IGHTING DEVICE Filed Nov. 30, 1932 3 Sheets-Sheet 2 l I I l u I I I 44 16 42 339 40 3.9 43

WiVweos April 17, 1934. GOSMAN 1,955,284

SEWING MACHINE LIGHTING DEVICE Filed Nov. 30, 1932 3 Sheets-Sheet 3 Herb erfi J Gcosman i 40 spective View of the shell and shade.

; 45 'a rearperspective View of the same.

Patented Apr. 17, 1934 UNITED STATES SEWING MACHINE LIGHTING DEVICE Herbert J. Goosman, Elizabeth, N. J., assignor to The Singer Manufacturing Company,'Elizabeth, N. J., a corporation of New Jersey Application November 30, 1932, Serial No. 644,925

7 Claims.

This invention has for an object to provide a sewing machine with an improved lighting device which, so far as the external or exposed parts thereof are concerned, is rigidly mountedon the sewing machine gooseneck, the lamp-bulb and lamp-socket elements being preferably yieldingly Supported within a protecting shell. A further object of the invention is to provide the device with switching means for turning the light on 10 and oii, which switching means is mounted in or on the protecting shell preferably independently of the lamp-socket.

Still further, the invention has for an object to provide a sewing machine with an improved lighting device which may be readily removed from the machine or applied thereto without the necessity i partially disassembling the lampsocket and its protecting shell for access to the conductor wires.

20 With the above and other objects in view, as will hereinafter appear, the invention comprises the devices, combinations, and arrangements of parts hereinafter set forth and illustrated in the accompanying drawings of a preferred embodi- 25 ment of the invention, from which the several features of the invention and the advantages attained thereby will be readily understood by those skilled in the art.

In the accompanying drawings, Fig. l is a side 30 elevation of a sewing machine embodying the invention in its preferred form. Fig. 2 is a top plan view of the machine. Fig. 3 is an enlarged section on the line 33, Fig. 2. Fig. 4 is an enlarged section on the line 44, Fig. 2. Fig. 5

1 is a horizontal longitudinal section through the electric lamp-socket, switch and shell elements. Fig. 6 is a vertical longitudinal section through the lamp-socket, lamp-socket shell and lampshade elements. Fig. '7 is a disassembled per- Fig. 8 is a section on the line 8-8, Fig. 6, with the lampbulb in end-elevation. Fig. 9 is a front perspective view of the electric outlet member removed from the sewing machinegoo-seneck. Fig. 10 is Fig. 11 is a disassembled perspective view of the parts of the lamp-socket, the lamp-socket shell, the switch, and plug-connector elements associated therewith, Fig. 12 is a rear elevation of the out let button, and Fig. 13 is a section on the line 13-13, Fig. 12. g

The sewing machine comprises the usual bed 1 and hollow gooseneck 2 including the overhanging arm 3 terminating in the head 4 in which is mounted the usual reciprocatory needle-bar 5 carrying the needle 6. The head 4 also has mounted in it the usual presser-bar 7 carrying the presser-foot 8.

Seated in a shouldered aperture 9 in the front side wall of the overhanging arm 3 of thegooseneck is an electric circuit outlet 10 in the form of a button of moulded insulating material having spaced parallel metallic insert sleeves 'll, 11 to the rear or inner ends of which are soldered or otherwise connected the current-supply wires 12 leading downwardly within the hollow gooseneck and thence outwardly to the usual connector-block 13. The current supply wires 12 are preferably passed within a length of flexible protective conduit 12' one end of which is seated or pressed into the groove 12 in the rearward side of the button 10 and held therein by the spring clip 12 and underlying insulating disk 12 The lighting device proper comprises a cylindrical lamp-socket shell 14 having a closed end 15, an open end 16, and a lateral extension 1'7, Fig. 2, between its ends. The lateral extension 17, includes the lower edge 18, Fig. 11, and end wall 19 which are integral with the shell 14. Such extension also includes the upper or capsection 20 and end-wall 21 which fit upon and are secured to the ledge 18 and end wall 19 by screws 22, Fig. 3, threaded into and securing the entire assembly to the lower horizontal arm 23 of the bracket 24 which is detachably secured, preferably by a single screw 25 to the sewing machine gooseneck.

Mounted in the aperture 26 in the cap-section 20, Fig. 11, is a toggle-switch element 27 of conventional internal construction, such as shown in the patent to Guett, No. 1,511,809, including the bridging contact-roller 28, Figs. 3 and5, its pivoted actuating lever 29 and the spaced stationary contacts 30, 31. The contact 30 is, in the present instance, formed with an externally projecting integral plug-connector element 32 which is received in one of the connector sleeves 11 of the outlet button 10.

Disposed below the switch 27, Fig. 7, is the plate '33 of molded insulating material having the metal insert pin 33 constituting a second plugconnector element received in the other of the sleeves 11 of the outlet button 10. The plate 33, Fig. 11, has an end-portion 34 of reduced thickness which is formed with an aperture 35 for passage therethrough of one of the fastening screws 22 for the cap-section end-wall 21 which is thereby clamped tightly upon the end-portion 34 and securely holds the plate 33 and its plugconnector element 33 rigidly related to the other plug-connector element 32. The switch-element 27 has a threaded neck 36 which passes through the aperture 26 in its supporting cap-member 20 and is held in position by the ring-nut 37.

Yieldingly mounted within the lamp-socket shell 14 is a cylindrical lamp-socket comprising front and rear sections 38, 39, respectively, of moulded insulation material which are fastened together by screws 40. A felt cushioning washer 41 is interposed between the rear lamp-socket section 39 and the closed end-wall 15 of the shell 14. An axial fastening screw 42 passes freely through the endwal 15 and washer 41 and is screwed into the threaded metal insert 43 in the socket section 39. A clearance is provided between the screw 42 and the wall of the hole in the shell 14 through which it passes. This clearance is sufiicient to permit a limited sidewise or vertical rocking movement of the lamp-socket 38, 39 within and relative to the shell 14 to cushion the lamp-bulb 44 against shocks or jars transmitted to the shell 14 from the sewing machine gooseneck. The lamp-socket section 39 is formed with a lateral notch 45 which is entered freely by a projection 46, Fig. 5, within the shell 14 to prevent axial turning movement of the lampsocket 38, 39 in the shell 14 when inserting or removing the lamp-bulb 44.

The lamp-bulb 44 has the conventional base 47 having the outwardly projecting pins 48 received in the bayonet locking slots 49 in the lamp-socket section 38. The usual contact pins 50, Fig. 5, yieldingly mounted in sockets 51 on the terminal straps 52 are provided to conduct the current to the lamp.

One of the lamp-socket terminal-straps 52, Fig. 4, is connected by the flexible conductor 53 to the inner end of the lower plug-connector pin 33. The other terminal strap 52 is connected by the flexible conductor 54 to the switch-terminal 31. The flexible conductors 53 and 54 do not interfere with the freedom of the lamp-socket 38, 39 to rock laterally relative to the shell 14; there being plenty of lateral clearance 55 be tween the lamp-socket and its shell. A sheet of insulation 56 is preferably interposed between the switch 27 and lamp-socket 38, 39, as shown in Figs. 4, 5 and 11. A lamp-shade 57, Figs. 7 and 8, of molded insulation material is detachably and rigidly connected to the shell 14 by means of a bayonet joint including the pins 58 on the shell 14 and the slots 59 and locking shoulder 60 on the base-ring 61 of the lamp-shade 57. A spring washer 62 is interposed between the lampshade base-ring 61 and the shouldered ring 63 on the shell 14 to take up any looseness between the lamp-shade and its supporting member 14.

A metallic reflector liner 64 is mounted within the lamp-shade 57. This liner 64 has one tongue 65, Fig. 7, entering one of the slots 59 in the lamp-shade. It is also formed with an apron 65 extending downwardly considerably below the inner edge 5'7 of the lamp-shade. The apron 65 is formed with an ear 66 which is screwed to the lamp-shade base-ring 61, as shown in Fig. 8. An air-gap 67, Fig. 8, of inverted trough shape is thus provided between the metal reflector 64 and the lamp-shade 5'7. This air-gap is open at the free end of the lamp-shade for egress of heated air between the shade and its reflector liner. The downwardly extending apron 65 acts as a cooling fin and assists materially in keeping the reflector 64 cool by dissipating heat conducted downwardly from the upper or arched roof-portion of the reflector. Obviously the shade and reflector assembly may be circularly adjusted upon the socket-shell 14 to direct the light forwardly or rearwardly to suit the requirements of the user.

An important advantage of the present device resides in the provision for easy application of the outlet button 10 and its supply wires 12 to the gooseneck 2 independently of the lamp-socket, switch, and shade assembly, which may be separately assembled and readily applied to the gooseneck 2 by means of the plug-connectors 32, 33' and the fastening screw 25. The shell 14 with its lateral extension 17 encloses, insulates and protects all live parts of the lamp-socket and switch elements. The molded parts are preferably made from any of the well known phenolic condensation products which have the valuable property of mechanical strength even when heated and are excellent electrical insulators. The shell 14, shade 57, reflector 64, switch 27 and plugconnector elements 32, 33 are rigidly associated and are rigidly mounted on the sewing machine gooseneck, yet the lamp 44 is cushioned against shock and vibration from the machine. No supporting strains are applied to the outlet button 10 and plug-connector elements 32, 33 which serve purely an electrical function in connecting the device to the sewing machine. The bracket 24 serves purely a mechanical function independently of the electrical parts 10, 32 and 33' to connect the device to the machine.

The invention is not to be understood as limited to the specific forms and arrangements of parts shown and described as it is obviously susceptible of embodiment in a variety of forms within the spirit and scope of the invention.

Having thus set forth the nature of the invention, what I claim herein is:--

1. The combination with a substantially cylindrical socket-shell having an opening in the sidewall thereof and a ledge extending under said opening, of an electric switch secured to said ledge and disposed adjacent said opening and externally of the cylindrical space within the socket-shell, lamp-base-engaging contacts mounted within the socket-shell, plug-connector elements associated with said switch and supported by said ledge, and means extending through said opening and electrically connecting said plug-connector elements to said lamp-base-engaging contacts, said switch being connected in circuit with said means.

2. The combination with a hollow sewing machine gooseneck and a lamp-socket shell rigidly mounted thereon, of an electric lamp-socket yieldingly mounted within and enclosed by said shell, a lamp-shade carried by said shell independently of said lamp-socket, and an electric switch also carried by said shell independently of said lamp-socket and electrically connected to the latter.

3. The combination with a hollow elongated lamp-socket shell having one closed end and one open end and a lateral extension intermediate its ends, of a lamp-socket disposed within said shell, cushioning means between said lamp-socket and shell permitting a limited relative movement between the two, an electric switch mounted in said lateral extension and supported independently of said lamp-socket, and means electrically connecting said lamp-socket in circuit with said switch.

4. The combination with a hollow sewing machine gooseneck, of a hollow elongated lampsocket shell having one closed end and one open end and a lateral extension between its ends, of

means rigidly connecting said lateral extension to said gooseneck, a lamp-socket disposed within said shell and having one end in juxtaposition with the closed end of said shell and a lamp-basereceiving end within the open end of said shell, a central fastening screw passing, freely through the closed end of said shell and loosely connecting said shell to the juxtaposed end of said lampsocket, cushioning means interposed between said juxtaposed ends of the shell and lamp-socket, interengaging means on said shell and lampsocket preventing rotation of the lamp-socket within the shell while permitting a limited lateral rocking movement of the lamp-socket in opposition to the resistance of said cushioning means, and an electric supply-circuit partially housed within said hollow gooseneck and extending to said lamp-socket through said lateral extension.

5. In an electric sewing machine lighting'device, the combination with a supporting bracket, of a lamp-socket shell having a laterally extending ledge secured to said bracket and a cap member secured to said ledge and spaced above the latter, an electric lamp-socket mounted in said shell, and electric switch and plug-connector elements mounted on said ledge and under said cap and electrically connected in circuit with said lamp-socket.

6. The combination with a sewing machine gooseneck having an electric outlet in a wall thereof, of a lamp socket shell, a plug-connector carried by said shell and detachably received in said outlet, a lamp-socket unit housed within said shell, and an electric switch unit separate and distinct from said lamp-socket unit and housed within said shell, said switch unit constituting a part of said plug connector.

7. The combination set forth in claim 6 in which the lamp-socket unit is yieldingly mounted in the shell while the switch unit is rigidly supported.

HERBERT J. GOOSMAN. 

